Royals in Belgium August 4Kate, William and Harry were greeted with cheers when they stepped out onto the balcony of the Town Hall in Mons .

Royals in Belgium August 4William and Kate wave from the balcony above a Belgian crowd.

Royals in Belgium August 4A better look at Kate's hair as she laughs with Prince Harry.

The Duke and Duchess of Cambridge joined with many of Europe's leaders today for a service commemorating the beginning of the First World War. The ceremony took place at the Cointe Inter-allied Memorial in Liège, Belgium.

The event honored all who lost their lives during WWI on Belgian soil, and speeches were given by King Philippe of Belgium, Prince William, as well as the heads of state for Belgium, France and Germany.

Kate wore a lovely cream-colored ensemble by Alexander McQueen (thanks to contributor WhatKateWore for identifying the piece!), paired with the "Fleur" fascinator by Jane Taylor. She carried a clutch by McQueen and wore her go-to L.K. Bennett Sledge nude pumps ($345 at Nordstrom). William was in a suit with a striped tie. Belgium's Queen Mathilde was dressed in a flowing pale blue-gray dress that gathered at the hip, with matching gray heels, clutch and hat. Both women stood out against the sea of dark suits behind them.

During his speech today, Prince William spoke about the power of reconciliation. "'We were enemies more than once in the last century, and today we are friends and allies. We salute those who died to give us our freedom. We will remember them." (You can read his full speech over on the Daily Mail.)

The royal couple then went on to attend a luncheon, and will later attend a twilight ceremony with Prince Harry on the French border in Mons.